- Patients with histologically proven malignant primary gliomas who have progressive disease after radiotherapy will be eligible for this protocol. These include glioblastoma (GBM), gliosarcoma, anaplastic astrocytoma (AA), anaplastic oligodendroglioma (AO), anaplastic mixed oligoastrocytoma (AMO), and malignant glioma/astrocytoma NOS. Additionally, patients with progressive low-grade gliomas and patients with infiltrative brainstem gliomas, diagnosed radiographically rather than by biopsy, will be eligible.